Tray for microwave oven



FIG. 1 is a bottom, front perspective view of a tray for microwave oven showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof; and,

FIG. 6 is a bottom plan view thereof.

The details shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a tray for microwave oven, as shown and described. 